US20230273392A1 - Lens driving device, camera module, and camera-equipped device - Google Patents

Lens driving device, camera module, and camera-equipped device Download PDF

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Publication number
US20230273392A1
US20230273392A1 US18/017,888 US202118017888A US2023273392A1 US 20230273392 A1 US20230273392 A1 US 20230273392A1 US 202118017888 A US202118017888 A US 202118017888A US 2023273392 A1 US2023273392 A1 US 2023273392A1
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United States
Prior art keywords
lens
shaft
movable
optical axis
disposed
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Pending
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US18/017,888
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English (en)
Inventor
Tomohiko Osaka
Shun Suzuki
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Mitsumi Electric Co Ltd
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Mitsumi Electric Co Ltd
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Publication date
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Priority to US18/017,888 priority Critical patent/US20230273392A1/en
Assigned to MITSUMI ELECTRIC CO., LTD. reassignment MITSUMI ELECTRIC CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: OSAKA, TOMOHIKO, SUZUKI, SHUN
Publication of US20230273392A1 publication Critical patent/US20230273392A1/en
Pending legal-status Critical Current

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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B5/04—Vertical adjustment of lens; Rising fronts
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/003—Alignment of optical elements
    • G02B7/005—Motorised alignment
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B27/00—Optical systems or apparatus not provided for by any of the groups G02B1/00 - G02B26/00, G02B30/00
    • G02B27/64—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image
    • G02B27/646—Imaging systems using optical elements for stabilisation of the lateral and angular position of the image compensating for small deviations, e.g. due to vibration or shake
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/08—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification adapted to co-operate with a remote control mechanism
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B7/00—Mountings, adjusting means, or light-tight connections, for optical elements
    • G02B7/02—Mountings, adjusting means, or light-tight connections, for optical elements for lenses
    • G02B7/04—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification
    • G02B7/10—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens
    • G02B7/102—Mountings, adjusting means, or light-tight connections, for optical elements for lenses with mechanism for focusing or varying magnification by relative axial movement of several lenses, e.g. of varifocal objective lens controlled by a microcomputer
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/12—Bodies with means for supporting objectives, supplementary lenses, filters, masks, or turrets
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B17/00—Details of cameras or camera bodies; Accessories therefor
    • G03B17/02—Bodies
    • G03B17/17—Bodies with reflectors arranged in beam forming the photographic image, e.g. for reducing dimensions of camera
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B3/00—Focusing arrangements of general interest for cameras, projectors or printers
    • G03B3/10—Power-operated focusing
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B30/00—Camera modules comprising integrated lens units and imaging units, specially adapted for being embedded in other devices, e.g. mobile phones or vehicles
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B5/00—Adjustment of optical system relative to image or object surface other than for focusing
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02N—ELECTRIC MACHINES NOT OTHERWISE PROVIDED FOR
    • H02N2/00—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction
    • H02N2/02—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors
    • H02N2/021—Electric machines in general using piezoelectric effect, electrostriction or magnetostriction producing linear motion, e.g. actuators; Linear positioners ; Linear motors using intermittent driving, e.g. step motors, piezoleg motors
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/54—Mounting of pick-up tubes, electronic image sensors, deviation or focusing coils
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N23/00—Cameras or camera modules comprising electronic image sensors; Control thereof
    • H04N23/50—Constructional details
    • H04N23/55—Optical parts specially adapted for electronic image sensors; Mounting thereof
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0007—Movement of one or more optical elements for control of motion blur
    • G03B2205/0023—Movement of one or more optical elements for control of motion blur by tilting or inclining one or more optical elements with respect to the optical axis
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B2205/00—Adjustment of optical system relative to image or object surface other than for focusing
    • G03B2205/0053—Driving means for the movement of one or more optical element
    • G03B2205/0061—Driving means for the movement of one or more optical element using piezoelectric actuators

Definitions

  • the present invention relates to a lens driving device, a camera module, and a camera-mounted device.
  • a camera module mounted on a thin camera-mounted device such as a smartphone is known.
  • a camera module is known to include a lens driving device having a zoom function for enlarging or downsizing a subject image.
  • Patent Literature (hereinafter, referred to as “PTL” 1) discloses a configuration including a fixed lens on which light from a subject is incident, two movable lenses on which the light deflected by the fixed lens is incident, and a lens driving part for moving the two movable lenses in the direction of the optical axis.
  • an ultrasonic motor as a driving part.
  • the ultrasonic motor for example, a configuration in which a movable part that holds a movable lens and a drive holder that transmits a driving force of the ultrasonic motor to the movable part are separately disposed is conceivable.
  • a total of two guide shafts for the drive holder and for the movable part are disposed, and the drive holder and the movable part are connected to each other by a connecting member (a spring member or the like for absorbing a positional deviation between the drive holder and the movable part).
  • the driving force is transmitted to the movable part via the drive holder to move the movable lens.
  • a magnet part for position detection is disposed in the drive holder, and the position of the movable part is detected by detecting the position of the drive holder.
  • An object of the present invention is to provide a lens driving device, a camera module, and a camera-mounted device capable of suppressing a response delay of a driving force to a movable part and an inclination of the movable part and accurately managing the position of the movable part.
  • a lens driving device includes:
  • a camera module according to the present invention includes:
  • a camera-mounted device is a camera-mounted device according to the present invention.
  • the present invention it is possible to suppress a response delay of the driving force to a movable part and an inclination of the movable part, and to accurately manage the position of the movable part.
  • FIG. 1 schematically illustrates a camera module according to an embodiment of the present invention
  • FIG. 2 schematically illustrates a configuration of the camera module as seen in a side view according to the present embodiment
  • FIG. 3 is a perspective view illustrating a housing portion of the camera module
  • FIG. 4 is a perspective view of a bottom wall portion side of the housing portion of the camera module
  • FIG. 5 is an exploded perspective view of a housing and a lens part
  • FIG. 6 is an exploded perspective view of a side wall portion and the bottom wall portion of the housing
  • FIG. 7 illustrates the housing as seen from the +side in the Z direction
  • FIG. 8 is an exploded perspective view of a drive holder and an interposition part
  • FIG. 9 is a diagram illustrating a second interposition member
  • FIG. 10 is a diagram illustrating the arrangement relationship between the interposition part and an ultrasonic motor
  • FIG. 11 is a perspective view of the ultrasonic motor
  • FIG. 12 is an exploded perspective view of the ultrasonic motor
  • FIG. 13 is an enlarged view of a contact portion between a resonant portion and the interposition part
  • FIG. 14 A is a view of the drive holder seen from the—side in the Y direction;
  • FIG. 14 B is a sectional view of the drive holder
  • FIG. 15 A is a diagram for explaining the positional relationship between the magnet and the position detecting part
  • FIG. 15 B is a diagram for explaining the positional relationship between the magnet and the position detecting part
  • FIG. 15 C is a diagram for explaining the positional relationship between the magnet and the position detecting part
  • FIG. 16 A is a diagram illustrating the smartphone in which the camera module is mounted
  • FIG. 16 B is a diagram illustrating the smartphone in which the camera module is mounted
  • FIG. 17 A is a diagram illustrating the automobile in which the camera module is mounted.
  • FIG. 17 B is a diagram illustrating the automobile in which the camera module is mounted.
  • FIG. 1 is a diagram schematically illustrating camera module 1 according to an embodiment of the present invention.
  • FIG. 2 is a diagram schematically illustrating a configuration of camera module 1 according to the present embodiment as viewed from the side.
  • Camera module 1 is mounted in thin camera-mounted devices such as, for example, smartphone M (see FIGS. 16 A and 16 B ), a mobile phone, a digital camera, a notebook personal computer, a tablet terminal, a portable game machine, in-vehicle camera, and the like.
  • an orthogonal coordinate system (X, Y, Z) is used.
  • the same orthogonal coordinate system (X, Y, Z) is also used for illustration of below-mentioned figures.
  • Camera module 1 is mounted such that the horizontal direction is the X direction, the vertical direction is the Y direction, and the front-rear direction is the Z direction, for example, during actually capturing an image with a camera-mounted device.
  • Light from a subject is incident from the—side (minus side) in the Z direction, and is deflected and guided to the +side (plus side) in the Y direction.
  • camera module 1 includes housing 10 , reflection driving part 20 , lens part 30 , image capturing part 40 , shaft part 50 (see FIG. 3 ), lens driving parts 60 (see FIG. 3 ), position detecting parts 70 (see FIG. 7 ), and drive control part 100 .
  • Drive control part 100 includes a Central Processing Unit (CPU), Read Only Memory (ROM), Random Access Memory (RAM), or the like.
  • the CPU reads a program suited to processing contents out of the ROM, develops the program in the RAM, and integrally controls an operation of each block of lens driving parts 60 in cooperation with the developed program.
  • drive control part 100 drives, in the Y direction (the direction of the optical axis), second lens unit 32 and third lens unit 33 to be described later of lens part housed in housing 10 .
  • camera module 1 performs stepless optical zoom and autofocus.
  • Housing 10 , shaft part 50 , lens driving parts 60 , position detecting parts 70 , and drive control part 100 correspond to the “lens driving device” of the present invention.
  • Reflection driving part 20 includes reflecting housing 21 , mirror 22 , and reflection drive control part 23 .
  • reflecting housing 21 is disposed adjacent to an end portion of housing 10 on the—side in the Y direction.
  • Mirror 22 is disposed in reflecting housing 21 , and reflects incident light L 1 toward housing 10 as reflected light L 2 .
  • Reflection drive control part 23 includes a CPU, a ROM, a RAM, and the like, and controls the orientation of mirror 22 .
  • Mirror 22 has two rotation axes (not illustrated) extending in the X direction and the Y direction.
  • reflection driving part 20 mirror 22 is rotated about the rotation axes under the control of reflection drive control part 23 .
  • camera module 1 has a shake correction function (Optical Image Stabilization (OIS) function) for optically correcting a shake (vibration) that occurs during capturing an image, so as to reduce image irregularities.
  • OIS Optical Image Stabilization
  • Reflected light L 2 incident on housing 10 is outputted to image capturing part 40 via lens part 30 accommodated in housing 10 .
  • Image capturing part 40 is disposed on the outer surface of housing 10 on the +side in the Y direction (second wall 112 to be described later), and is configured to allow reflected light L 2 to be incident thereon through lens part 30 .
  • Image capturing part 40 includes an image capturing device, a board, and the like (not illustrated).
  • the image capturing device is composed of, for example, a Charge-Coupled Device (CCD) image sensor, a Complementary Metal Oxide Semiconductor (CMOS) image sensor, or the like.
  • CCD Charge-Coupled Device
  • CMOS Complementary Metal Oxide Semiconductor
  • the image capturing device is mounted on the board and electrically connected to the interconnections on the board via bonding wires.
  • the image capturing device captures a subject image imaged by lens part 30 and outputs an electrical signal corresponding to the subject image.
  • a printed wiring board (not illustrated) is electrically connected to the board of image capturing part 40 .
  • the power supply to the image capturing device and the output of the electrical signal of the subject image imaged by the image capturing device are performed via the printed wiring board.
  • the electrical signal is outputted to image capturing control part 200 disposed in the camera-mounted device.
  • Image capturing control part 200 includes a CPU, a ROM, a RAM, and the like, and processes image information obtained by camera module 1 .
  • Image capturing control part 200 may be mounted on the camera-mounted device, or may also be built in camera module 1 .
  • housing 10 houses lens part 30 , shaft part 50 , and lens driving parts 60 (see also FIG. 5 ), and for example, has a rectangular parallelepiped shape as a whole.
  • Housing 10 has side wall portion 11 , and bottom wall portion 12 .
  • Side wall portion 11 is a wall portion made of, for example, resin and having a portion opening on the—side in the Y direction, and has first walls 111 , second wall 112 , third wall 113 , and fourth wall 114 (see also FIG. 5 and the like).
  • a pair of first walls 111 are configured to extend in the Y direction, and are disposed on both sides in the X direction.
  • Placement portion 111 A in which an ultrasonic motor to be described later is disposed is disposed on an inner surface of housing 10 at each of first walls 111 .
  • Placement portion 111 A of first wall 111 on the—side in the X direction is disposed on the +side of housing 10 in the Y direction, and placement portion 111 A of first wall 111 on the +side in the X direction is disposed on the—side of housing 10 in the Y direction.
  • terminal placement portion 111 C is disposed on each of first walls 111 .
  • Terminal placement portion 111 C includes, for example, board part 64 (see FIG. 7 ) disposed across the inside and outside of housing 10 via a gap formed between first wall 111 and bottom wall portion 12 .
  • a portion of board part 64 disposed outside housing 10 is connected to predetermined interconnections of the camera-mounted device.
  • engaged portions 111 B with which positioning portions 121 of bottom wall portion 12 are engaged are formed in the bottom surface of first wall 111 (the surface on the—side in the Z direction).
  • second wall 112 is configured to extend in the X direction, and is disposed to connect together the end portions of the pair of first walls 111 on the +side in the Y direction.
  • Second wall 112 is provided with shaft support portions 112 A and opening portion 112 B.
  • shaft support portions 112 A are holes that support first shaft 51 and second shaft 52 , which will be described later.
  • Shaft support portion 112 A corresponding to first shaft 51 is disposed in second wall 112 on the +side of opening portion 112 B in the X direction.
  • Shaft support portion 112 A corresponding to second shaft 52 is disposed in second wall 112 on the—side of opening portion 112 B in the X direction.
  • Opening portion 112 B is an opening through which light passing through lens part 30 (reflected light L 2 described above) enters the image capturing device, and is disposed in a central portion of second wall 112 in the X direction.
  • third walls 113 are disposed respectively on the end portions of the pair of first walls 111 on the—side in the Y direction.
  • the pair of third walls 113 are disposed to surround a space formed by first wall 111 and second wall 112 .
  • a gap large enough for first lens unit 31 of lens part 30 to enter there, and bridging portion 113 A for bridging the end portions of respective third walls 113 on the—side in the Z direction are disposed.
  • shaft support portions 113 B for supporting first shaft 51 and second shaft 52 are disposed in the vicinities of central portions of the pair of third walls 113 in the Z direction.
  • Shaft support portion 113 B corresponding to first shaft 51 is disposed in third wall 113 on the +side in the X direction
  • shaft support portion 113 B corresponding to second shaft 52 is disposed in third wall 113 on the—side in the X direction.
  • Each of shaft support portions 113 B is an elongated hole having a length in the Z direction corresponding to a placement area of each of two shaft support portions 112 A in second wall 112 described above. Shaft support portions 113 B are capable of supporting first shaft 51 and second shaft 52 supported by two shaft support portions 112 A of second wall 112 , respectively.
  • fourth walls 114 form bottom walls on the—side in the Z direction of the space formed by first walls 111 , third walls 113 corresponding to first walls 111 , and second wall 112 , and are disposed in regions corresponding to third walls 113 in the X direction (see also FIG. 7 ). Therefore, a gap is formed between fourth walls 114 on both sides in the X direction.
  • bottom wall portion 12 is, for example, a substantially rectangular metal plate forming the bottom wall of housing 10 , and is disposed to bridge fourth walls 114 and the pair of first walls 111 on both sides in the X direction.
  • Bottom wall portion 12 is integrated by insert molding with the bottom portions of side wall portions 11 including the bottom portions of the pair of first walls 111 . Further, in order that there is not any portion of bottom wall portion 12 at a portion corresponding to first lens unit 31 , an end portion of bottom wall portion 12 on the—side in the Y direction is cut out.
  • Positioning portions 121 are formed on the both lateral ends of bottom wall portion 12 in the X direction. Positioning portions 121 are formed to protrude from the both lateral ends of bottom wall portion 12 , and are to be engaged with engaged portions 111 B of first wall 111 described above. Thus, it is possible to position bottom wall portion 12 in the Y direction.
  • bent portions 122 are disposed on the lateral ends of bottom wall portion 12 in the X direction and Y direction. Bent portions 122 are formed by bending the lateral ends on the +side in the Z direction.
  • grooves (not illustrated) in which bent portions 122 are fitted are formed in portions of housing 10 corresponding to bent portions 122 . Bent portions 122 are fitted in the grooves, and accordingly, bottom wall portion 12 is fixed to housing 10 .
  • a plurality of half punches 123 disposed in the Y direction are formed in the surface of bottom wall portion 12 .
  • Half punches 123 are formed in bottom wall portion 12 over the X direction. In the present embodiment, a total of six half punches 123 are formed.
  • Such formation of half punches 123 can improve the strength of the bottom wall portion of housing 10 .
  • lens part 30 is disposed in a region that is interposed between the pair of first walls 111 and that includes a region where reflected light L 2 from reflection driving part 20 (see FIG. 2 ) passes.
  • Lens part 30 includes first lens unit 31 , second lens unit 32 , third lens unit 33 , and fourth lens unit 34 that are disposed side by side in the Y direction.
  • First lens unit 31 is disposed on the most upstream side in the incidence direction of reflected light L 2 (the direction toward the +side in the Y direction), and includes main body portion 31 A and supported portion 31 B.
  • Main body portion 31 A is a portion including a lens, and is configured such that the side surfaces thereof are curved to be convex at their central portions in the Z direction, for example.
  • the side surfaces of third walls 113 on the first lens unit 31 side are shaped, for example, to conform to the side surfaces of main body portion 31 A, and are configured such that the curved portions of main body portion 31 A are fitted to the side surfaces of third walls 113 .
  • Supported portion 31 B is disposed on the +side of main body portion 31 A in the Y direction, and includes portions protruding on both sides in the X direction from main body portion 31 A. Portions of third walls 113 corresponding to supported portion 31 B are configured to be recessed relative to the top surfaces of third walls 113 to allow supported portion 31 B to be disposed.
  • main body portion 31 A is disposed along the side surfaces of third walls 113 and supported portion 31 B is supported by third walls 113 , whereby first lens unit 31 is fixed between the pair of third walls 113 .
  • Second lens unit 32 is disposed on the downstream side of first lens unit 31 in the incidence direction, and includes a lens through which light passing through first lens unit 31 passes. Second lens unit 32 is configured to be movable by being supported by drive holder 61 to be described later.
  • Second lens unit 32 corresponds to the “movable part” and the “first movable part” of the present invention.
  • the lens included in second lens unit 32 corresponds to the “movable lens” and the “first movable lens” of the present invention.
  • Third lens unit 33 is disposed on the downstream side of second lens unit 32 in the incidence direction, and includes a lens (movable lens) through which light passing through first lens unit 31 passes. Third lens unit 33 is configured to be movable by being supported by drive holder 61 to be described later.
  • Third lens unit 33 corresponds to the “movable part” and the “second movable part” of the present invention.
  • the lens included in third lens unit 33 corresponds to the “movable lens” and the “second movable lens” of the present invention.
  • Fourth lens unit 34 is disposed on the most downstream side in the incidence direction, and includes main body portion 34 A and supported portions 34 B.
  • Main body portion 34 A includes a lens.
  • Supported portions 34 B protrude from the side surfaces of main body portion 34 A in the X direction.
  • the inner surface of second wall 112 form lens support portion 112 C configured to conform to the shape of fourth lens unit 34 .
  • Fourth lens unit 34 is fixed to second wall 112 by being supported by lens support portion 112 C.
  • lenses in first to fourth lens units 31 to 34 may be assembled to housing 10 at the time of manufacturing the lens driving device, or may be assembled to housing 10 at the time of manufacturing camera module 1 from the lens driving device.
  • shaft part 50 includes first shaft 51 and second shaft 52 made of, for example, stainless steel.
  • First shaft 51 and second shaft 52 extend in the Y direction and are disposed in respective regions of the pair of third walls 113 in the X direction.
  • First shaft 51 is disposed in a region of third wall 113 on the +side in the X direction.
  • Second shaft 52 is disposed in a region of third wall 113 on the—side in the X direction.
  • first shaft 51 and second shaft 52 have the same length, and are supported by shaft support portions 113 B of third walls 113 and shaft support portions 112 A of second walls 112 .
  • the pairs of first walls 111 , third walls 113 , and fourth walls 114 respectively have, for example, substantially the same shapes, and are disposed symmetrically with respect to optical axis O of lens part 30 on both sides in the X direction.
  • First shaft 51 and second shaft 52 are supported by the pair of third walls 113 , respectively, and are thus disposed symmetrically with respect to optical axis O.
  • Lens driving parts 60 are disposed to correspond respectively to second lens unit 32 and third lens unit 33 , and independently move corresponding second lens unit 32 and third lens unit 33 under the control of drive control part 100 .
  • Lens driving parts 60 are disposed in regions of fourth walls 114 that are surrounded by first wall 111 , second wall 112 , and third walls 113 and are located on opposite sides in the X direction. That is, lens driving parts 60 are disposed on opposite sides of optical axis O in housing 10 at second lens unit 32 and third lens unit 33 , respectively.
  • lens driving part 60 on the +side in the X direction drives second lens unit 32 in the Y direction
  • lens driving part 60 on the—side in the X direction drives third lens unit 33 in the Y direction. That is, lens driving part 60 on the +side in the X direction corresponds to the “driving part” and the “first driving part” of the present invention, and lens driving part 60 on the—side in the X direction corresponds to the “driving part” and the “second driving part” of the present invention.
  • each of lens driving parts 60 has substantially the same configuration in the present embodiment, in the following description, only lens driving part 60 corresponding to second lens unit 32 will be described unless otherwise specified, and the description of lens driving part 60 corresponding to third lens unit 33 will be omitted. Further, since lens driving parts 60 are symmetrically disposed in the X direction and the Y direction in the present embodiment, the relationship between the +side and the—side of lens driving part 60 corresponding to third lens unit 33 in the directions is reverse with respect to the relationship between the +side and the—side of lens driving part 60 corresponding to second lens unit 32 in the directions.
  • Each of lens driving parts 60 includes drive holder 61 , interposition part 62 , ultrasonic motor 63 , board part 64 , and boosting part 65 .
  • Drive holder 61 supports one of second lens unit 32 and third lens unit 33 .
  • Drive holder 61 is configured to be movable in the direction of optical axis O by shaft part 50 guiding movement in the direction (Y direction) of optical axis O.
  • second lens unit 32 or third lens unit 33 also moves in the Y direction. Details of drive holder 61 will be described later.
  • interposition part 62 includes first interposition member 621 and second interposition member 622 .
  • First interposition member 621 is formed of, for example, a flat plate-shaped metal member, and is bonded to the surface of one of below-described second portions 661 B of first supported portion 661 of drive holder 61 that is on the +side in the X direction.
  • Two protrusions D1 and D2 are disposed on the +side of second portion 661 B in the X direction.
  • protrusion D1 and D2 protrude from the surface of second portion 661 B and are disposed side by side in the Y direction.
  • protrusion D1 is disposed in the vicinity of the end portion of second portion 661 B on the—side in the Y direction
  • protrusion D2 is disposed in the vicinity of the end portion of second portion 661 B on the +side in the Y direction.
  • First interposition member 621 is disposed parallel to the direction of the optical axis (Y direction), and includes engaging holes 621 A and 621 B that are engaged with two protrusions D1 and D2.
  • second interposition member 622 is formed of, for example, a flat plate-shaped metal member, and is adhesively fixed to, for example, first interposition member 621 .
  • Second interposition member 622 includes main body portion 622 A and contact portions 622 B.
  • Main body portion 622 A has a flat surface that is parallel to the direction of the optical axis (Y direction), and is adhesively fixed to first interposition member 621 .
  • Engaging holes A1 and A2 with which two protrusions D1 and D2 of second portion 661 B are engaged are formed in main body portion 622 A.
  • Engaging holes 621 A and 621 A 1 are disposed respectively in the vicinities of the end portions of interposition members 621 and 622 on the—side in the Y direction, and are engaged with protrusion D1.
  • Engaging holes 621 A and 621 A 1 are formed to have a size allowing protrusion D1 to be engaged with engaging holes 621 A and 621 A 1 and allowing interposition part 62 to rotate about engaging holes 621 A and 621 A 1 with which protrusion D1 is engaged.
  • Engaging holes 621 B and 621 A 2 are disposed near the end portions of interposition members 621 and 622 on the +side in the Y direction, and are engaged with protrusion D2.
  • Engaging holes 621 B and 621 A 2 are sized to be engageable with protrusion D2 and to have a gap in which the inner edge of engaging holes 621 B and 621 A 2 are movable with respect to protrusion D2.
  • interposition part 62 is rotatable around engaging holes 621 A and 621 A 1 (the protrusion D1) within engaging holes 621 B and 621 A 2 . Consequently, the attitude of interposition part 62 can be adjusted so that contact portions 622 B of interposition part 62 are parallel to first shaft 51 .
  • Contact portions 622 B are portions with which an oscillator of ultrasonic motor 63 makes contact, and are formed by bending the end portions of main body portion 622 A on both sides in the Z direction toward the side opposite to the lens part.
  • main body portion 622 A connecting together the pair of contact portions 622 B is disposed to cover ultrasonic motor 63 from the—side in the X direction, and contact portions 622 B are disposed to sandwich ultrasonic motor 63 (resonant portion 631 ) (see FIG. 10 ).
  • Interposition part 62 thus configured generates a thrust in the direction of the optical axis (Y direction) in interposition part 62 by a force acting on contact portions 622 B from the oscillator of ultrasonic motor 63 .
  • a thrust from interposition part 62 to drive holder 61 for movement in the direction of the optical axis (Y direction).
  • a plurality of openings C1, C2, C3, and C4 are formed in connecting sections 622 C between main body portion 622 A and contact portions 622 B.
  • the plurality of openings C1, C2, C3, and C4 disposed side by side in the Y direction are four in number on each side of the connecting portions in the Y direction.
  • two openings C2 and C3 on the central side in the Y direction are configured to have lengths in the Y direction and in the Z direction that are longer than the lengths of two opening C1 and C4 on the opposite end sides in the Y direction.
  • connecting sections 622 C five connecting portions 622 D disposed at intervals in the direction of the optical axis are formed.
  • connecting portions 622 D in the Y direction increase in the order from the connecting section in the middle in the Y direction toward connecting portion 622 D located on the outer side in the present embodiment.
  • middle connecting portion 622 D in the Y direction is the narrowest of five connecting portions 622 D.
  • Connecting portions 622 D at opposite ends in the Y direction are the widest of five connecting portions 622 D.
  • Connecting portions 622 D located between middle connecting portion 622 D and connecting portions 622 D at opposite ends are wider than middle connecting portion 622 D and narrower than connecting portions 622 D at opposite ends.
  • connecting portions 622 D The closer the connecting portions 622 D is located to the end sides, the lower the strengths of connecting portions 622 D (connecting section 622 C).
  • the strengths of connecting sections 622 C are adjusted by changing the sizes of openings C1, C2, C3, and C4 and the widths of connecting portions 622 D in connecting section 622 C.
  • the moving force by interposition part 62 can be stably generated during operation of the stepless optical zoom function even when the movable part is moved within a relatively long movement range.
  • each ultrasonic motor 63 is a driving source that generates a driving force for moving drive holder 61 , and is fixedly disposed on each of placement portions 111 A (see FIG. 3 and the like) of first wall 111 .
  • Ultrasonic motor 63 includes resonant portion 631 , piezoelectric elements 632 , first electrode 633 , and second electrode 634 .
  • One of ultrasonic motors 63 on the +side in the X direction corresponds to the “first ultrasonic motor” of the present invention
  • the other one of ultrasonic motors 63 on the—side in the X direction corresponds to the “second ultrasonic motor” of the present invention.
  • Resonant portion 631 is formed of, for example, a conductive material and resonates with the vibration of piezoelectric elements 632 to convert a vibrational motion into a linear motion of drive holder 61 .
  • resonant portion 631 vibrates in an inclination direction inclined with respect to the direction of the optical axis (Y direction) based on the vibration of piezoelectric elements 632 so as to press interposition part 62 . Accordingly, a thrust to move drive holder 61 via interposition part 62 in the direction of the optical axis is generated.
  • Resonant portion 631 is disposed to be sandwiched between two contact portions 622 B of interposition part 62 . As illustrated in FIG. 12 , resonant portion 631 includes body portion 631 A, two oscillators 631 B, protruding portion 631 C, and energization portion 631 D.
  • Body portion 631 A is configured in a substantially rectangular shape, for example, and is a portion sandwiched between piezoelectric elements 632 .
  • Two oscillators 631 B extend in the Y direction from opposite end portions of body portion 631 A in the Z direction.
  • Two oscillators 631 B have symmetrical shapes, and their respective free end portions make contact with contact portions 622 B of interposition part 62 .
  • Protruding portion 631 C extends to the +side in the Y direction from the central portion of body portion 631 A in the Z direction.
  • Energization portion 631 D extends to the side opposite to protruding portion 631 C (the—side in the Y direction) from the central portion of body portion 631 A in the Z direction.
  • Each of piezoelectric elements 632 is, for example, a vibration element formed of a ceramic material in a plate shape, and generates vibration by application of a high-frequency voltage.
  • Two piezoelectric elements 632 are disposed to sandwich body portion 631 A of resonant portion 631 in the X direction, respectively.
  • First electrode 633 includes clamping portion 633 A for clamping resonant portion 631 and piezoelectric elements 632 , and electrode portion 633 B to which a voltage is applied. Via clamping portion 633 A for clamping piezoelectric elements 632 and the like, first electrode 633 applies a voltage to piezoelectric elements 632 .
  • Second electrode 634 is electrically connected to energization portion 631 D of resonant portion 631 . First electrode 633 and second electrode 634 make contact with an input terminal of below-described board part 64 inside housing 10 .
  • Two piezoelectric elements 632 are bonded to body portion 631 A of resonant portion 631 and are held in between by first electrode 633 , so that these are electrically connected to one another.
  • first electrode 633 one side of a power supply path is connected to first electrode 633 , and the other side is connected to second electrode 634 .
  • a voltage is applied to piezoelectric elements 632 , and a vibration is thus generated.
  • Resonant portion 631 has at least two resonant frequencies, and deforms in behaviors different between the resonant frequencies. In other words, the entire shape of resonant portion 631 is set such that resonant portion 631 deforms in behaviors different between the two resonant frequencies.
  • the different behaviors mean behaviors of moving drive holder 61 to the +side and to the—side in the Y direction via interposition part 62 .
  • resonant portion 631 is disposed such that either of the pair of contact portions 622 B of interposition part 62 and oscillators 631 B face each other.
  • the tip ends of oscillators 631 B press (see arrows A) contact portions 622 B in a direction inclined with respect to the Y direction from the opposing sides of contact portions 622 B.
  • interposition part 62 When contact portions 622 B are pressed in the directions of arrows A by the tip ends of oscillators 631 B, reaction forces of the contact portions returning on the oscillators 631 B sides are generated at contact portions 622 B.
  • interposition part 62 generates a reaction force in a direction from the outside of the pair of contact portions 622 B toward the inside based on the contact between oscillators 631 B and the pair of contact portions 622 B.
  • contact portions 622 B are configured to extend in the Y direction. When pressed against oscillators 631 B, contact portions 622 B move in the Y direction while making sliding contact with oscillators 631 B. Therefore, contact portions 622 B are continuously pressed by oscillators 631 B. Thus, drive holder 61 to be bonded to interposition part 62 can be moved continuously in the Y direction.
  • the pressing directions of oscillators 631 B are the directions of arrows A and the sliding direction of contact portions 622 B is the direction of arrows B
  • the pressing directions of oscillators 631 B are the directions of arrows C and the sliding direction of contact portions 622 B is the direction of arrows D.
  • Such driving operation is performed by each of ultrasonic motors 63 disposed on each of first walls 111 on both sides in the X direction. That is, ultrasonic motors 63 respectively drive second lens unit 32 and third lens unit 33 independently in the direction of the optical axis.
  • restricting portions 114 A are disposed in the vicinities of the center portions of fourth walls 114 in the Y direction.
  • restricting portions 114 A are disposed at positions where contact with drive holders 61 is possible. Therefore, when drive holder 61 on the +side in the X direction moves to the +side in the Y direction, drive holder 61 makes contact with restricting portion 114 A. Further, when drive holder 61 on the—side in the X direction moves to the—side in the Y direction, drive holder 61 makes contact with restricting portion 114 A. Each of restricting portions 114 A thus restricts excessive movement of drive holder 61 .
  • Each of board parts 64 is a circuit board (for example, a flexible board) having interconnections for inputting an input voltage from the outside (camera-mounted device) to ultrasonic motor 63 , interconnections for outputting a signal from position detecting parts 70 to the outside, and/or the like.
  • Board part 64 is configured to extend from the end portion of one of the pair of fourth walls 114 on the—side in the Y direction toward the +side in the Y direction.
  • drive holder 61 and ultrasonic motor 63 on the—side in the X direction are located on the +side in the Y direction relative to drive holder 61 and ultrasonic motor 63 on the +side in the X direction
  • board part 64 on the—side in the X direction is configured to be longer in the Y direction than board part 64 on the +side in the X direction.
  • Terminals making contact with first electrodes 633 and second electrodes 634 of ultrasonic motors 63 and position detecting parts 70 are disposed at positions in board parts 64 corresponding to drive holders 61 .
  • gaps are formed at portions corresponding to terminal placement portions 111 C of first walls 111 so as to allow board parts 64 to pass therethrough.
  • Each of board parts 64 is configured such that a portion of board part 64 corresponding to terminal placement portion 111 C is disposed on terminal placement portion 111 C outside housing 10 via one of the gaps. Via this portion, an input voltage from the outside is inputted to lens driving part 60 (ultrasonic motor 63 ) via board part 64 , and a signal from position detecting part 70 is outputted to the outside (such as drive control part 100 ).
  • boosting part 65 is disposed at the end portion of each of board parts 64 on the—side in the Y direction.
  • Boosting part 65 includes an inductor that boosts the input voltage to lens driving part 60 and supplies the boosted voltage to ultrasonic motor 63 .
  • the inductors have large individual variations. Thus, in the case of a configuration in which an inductor is disposed outside housing 10 , it is necessary to additionally adjust a driving voltage of lens driving part 60 by a device on which housing 10 is mounted. In contrast, in the present embodiment, the inductors are disposed in housing 10 . It is thus not necessary to adjust the driving voltage of lens driving part 60 for each device on which housing 10 is mounted. Accordingly, it is possible to improve the usability of a user.
  • Each of position detecting parts 70 is, for example, a Hall element that detects a position of magnet part 663 , which will be described later, of drive holder 61 , and is disposed on board part 64 at a position facing drive holder 61 (magnet part 663 ).
  • Drive holder 61 moves in the direction of the optical axis by driving ultrasonic motor 63 , thereby moving second lens unit 32 or third lens unit 33 in the direction of the optical axis.
  • Drive holder 61 includes moving part 66 and supporting part 67 .
  • moving part 66 is a portion that is supported by shaft part 50 so as to be movable in the Y direction (the direction of the optical axis), and is formed of a resin member.
  • Moving part 66 includes first supported portion 661 and second supported portion 662 .
  • First supported portion 661 is a portion supported by first shaft 51 at the +side of housing 10 in the X direction.
  • First supported portion 661 is formed in the shape of a box opening on the +side in the Z direction, and includes first portion 661 A, second portions 661 B, and third portions 661 C. Note that, while first supported portion 661 described above corresponds to second lens unit 32 , the first supported portion corresponding to third lens unit 33 is supported by second shaft 52 (corresponding to the “first shaft” of the present invention).
  • First portion 661 A is a portion forming a bottom surface (a surface on the—side in the Z direction) of first supported portion 661 , and is formed in a rectangular shape in which the sides extending in the X direction are a short side and the sides extending in the Y direction are a long side.
  • Second portions 661 B are portions forming side surfaces (opposite sides in the X direction) corresponding to the pair of long-side portions of first portion 661 A. Above-described two protrusions D1 and D2 are disposed on the outer surface of one of second portions 661 B on the +side in the X direction. Second portion 661 B on the—side in the X direction includes connecting section 661 E connected to supporting portion 67 . Connecting section 661 E extends from the end portion of second portion 661 B on the—side in the Z direction toward the—side in the Z direction.
  • Third portions 661 C are portions forming side surfaces (opposite sides in the Y direction) corresponding to the pair of short-side portions of first portion 661 A. Shaft hole 661 D through which first shaft 51 passes is formed in third portions 661 C. Thus, drive holder 61 is supported by first shaft 51 .
  • first shaft 51 can make contact only with walls defining shaft hole 661 D in the pair of third portions 661 C.
  • the first shaft can be in contact with the entire top surface portion, and would make contact with any portion of the top surface portion. Accordingly, there is a possibility that a force applied from the top surface portion (the +side in the Z direction) to the first shaft is distributed, and the movement of the drive holder is affected.
  • first shaft 51 can make contact with the pair of third portions 661 C only at two places corresponding to the pair of third portions 661 C.
  • a force is applied only at the two places. Therefore, it is possible to prevent the force applied from the +side in the Z direction to first shaft 51 from becoming distributed in the Y direction entirely, and thus to prevent the movement of the drive holder from being affected.
  • magnet part 663 for detecting the position of second lens unit 32 is disposed on the surface of first supported portion 661 on the—side of first portion 661 A in the Z direction.
  • Magnet part 663 includes two magnets 663 A and 663 B disposed side by side in the X direction.
  • Magnet part 663 is disposed, for example, in a recessed portion formed in the surface of first supported portion 661 on the— side in the Z direction, and faces position detecting part 70 described above.
  • magnet part 663 In magnet part 663 , one magnet 663 A is disposed such that the N pole faces position detecting part 70 , and other magnet 663 B is disposed such that the S pole faces position detecting part 70 . That is, two magnets 663 A and 663 B are magnetized in a direction along a direction (Z direction in the present embodiment) in which magnet part 663 faces position detecting part 70 , and such that the different poles face position detecting part 70 .
  • Magnets 663 A and 663 B are disposed in contact with each other. Therefore, the different poles are arranged adjacently at opposing surface 663 C of magnet part 663 facing position detecting part 70 .
  • magnet parts 663 are disposed to be inclined with respect to the Y direction. That is, border 663 D between the different poles in each of magnet parts 663 extends in an inclined manner with respect to the optical axis.
  • the proportion of the N pole and the proportion of the S pole at an opposing portion between position detecting part 70 and magnet part 663 can be made different in accordance with the movement of drive holder 61 in the Y direction.
  • position detecting part 70 faces the end portion of magnet part 663 on the +side in the Y direction.
  • Position detecting part 70 faces a portion of the end portion where the proportion of the N pole of magnet 663 B is large.
  • magnet part 663 When drive holder 61 is moved to the +side in the Y direction, magnet part 663 also moves with drive holder 61 . Accordingly, the opposing portion of position detecting part 70 with respect to magnet part 663 changes. Since magnet part 663 is inclined, the proportion of the S pole at the opposing portion with respect to position detecting part 70 gradually increases.
  • the magnitude of the magnetic force detected by position detecting part 70 can be different between the positions of drive holder 61 . It is thus possible to accurately detect the position of drive holder 61 in the Y direction by position detecting part 70 .
  • second supported portion 662 is supported by second shaft 52 on the—side of housing 10 in the X direction.
  • Second supported portion 662 includes fourth portion 662 A and fifth portions 662 B. Note that, while second supported portion 662 described above corresponds to second lens unit 32 , the second supported portion corresponding to third lens unit 33 is supported by first shaft 51 (corresponding to the second shaft of the present invention).
  • Fourth portion 662 A is configured to extend in the Z direction and includes connecting section 662 C connected to supporting part 67 .
  • Connecting section 662 C extends from the end portion of fourth portion 662 A on the—side in the Z direction toward the—side in the Z direction.
  • a pair of fifth portions 662 B are disposed at opposite end portions of fourth portion 662 A in the Z direction, and extend from the opposite end portions toward the—side in the X direction. Since second shaft 52 passes between the pair of fifth portions 662 B, second supported portion 662 is supported by second shaft 52 .
  • Supporting part 67 is a portion that supports second lens unit 32 (third lens unit 33 ) at a position closer to the optical axis (closer to the center of housing 10 in the X direction) than shaft part 50 is to the optical axis.
  • Supporting part 67 is formed of metal member 671 .
  • Metal member 671 is insert-molded into connecting sections 661 E and 662 C of moving part 66 .
  • Second lens unit 32 (third lens unit 33 ) is adhesively fixed to metal member 671 of supporting part 67 .
  • the method of fixing second lens unit 32 (third lens unit 33 ) to supporting part 67 may be any method as long as second lens unit 32 (third lens unit 33 ) can be fixed.
  • Supporting part 67 is disposed such that the end portion of the supporting part on the +side in the X direction is connected to connecting section 661 E of first supported portion 661 , and the end portion of the supporting part on the—side in the X direction is connected to connecting section 662 C of second supported portion 662 . Accordingly, supporting part 67 is positioned on the—side in the Z direction in comparison to first shaft 51 and second shaft 52 , and accordingly, second lens unit 32 (third lens unit 33 ) is positioned on the—side in the Z direction in comparison to first shaft 51 and second shaft 52 .
  • the height range of first shaft 51 and second shaft 52 supporting drive holder 61 is a range including the height position of center G of second lens unit 32 (third lens unit 33 ).
  • the height range of first shaft 51 means a range from the height position of the end portion of first shaft 51 on the +side in the Z direction to the height position of the end portion of first shaft 51 on the—side in the Z direction.
  • the height range of second shaft 52 means a range from the height position of the end portion of second shaft 52 on the +side in the Z direction to the height position of the end portion of second shaft 52 on the—side in the Z direction. Since first shaft 51 and second shaft 52 have the same diameter and have the same height position, the height ranges of first shaft 51 and second shaft 52 are the same height range.
  • the height positions of the axial centers of first shaft 51 and second shaft 52 are the same as the height position of center G of second lens unit 32 (third lens unit 33 ) (see the broken line in FIG. 14 A ).
  • intermediate position P between the pair of contact portions 622 B of interposition part 62 is the same as the height position of center G of second lens unit 32 (third lens unit 33 ) (see the broken line in FIG. 14 A ).
  • second lens unit 32 (third lens unit 33 ) is supported by drive holder 61 .
  • the ultrasonic motor when used as the driving part, it is conceivable to separately dispose the movable part for holding the movable lens and the drive holder for transmitting the driving force of the ultrasonic motor to the movable part.
  • a connecting member a spring member or the like for absorbing a positional deviation between the drive holder and the movable part
  • the position detection magnet part is disposed in the drive holder, the position of the movable part is detected by detecting the position of the drive holder.
  • the position detecting part does not directly detect the position of the movable part.
  • the position of the movable part cannot be accurately managed.
  • drive holder 61 supports second lens unit 32 (third lens unit 33 ) in the present embodiment, the movement of drive holder 61 itself is the movement of second lens unit 32 (third lens unit 33 ). Consequently, it is possible to suppress the occurrence of a response delay of the driving force to second lens unit 32 (third lens unit 33 ), and it is possible to accurately detect the position of second lens unit 32 (third lens unit 33 ), and thus to accurately manage the position.
  • second lens unit 32 (third lens unit 33 ) is supported by supporting part 67 of drive holder 61 , it is possible to suppress the occurrence of inclination of second lens unit 32 (third lens unit 33 ) with respect to drive holder 61 due to the above-described response delay.
  • the height range of first shaft 51 and second shaft 52 is a range including the height position of the center of second lens unit 32 (third lens unit 33 ).
  • the drive holder moves along the first shaft and the second shaft.
  • first shaft 51 and second shaft 52 is a range including the height position of the center of second lens unit 32 (third lens unit 33 ) in the present embodiment. It is thus possible to reduce the degree of inclination of the movable lens caused by rattling or misalignment. Consequently, it is possible to reduce the degree of influence caused by rattling or misalignment in each component.
  • intermediate position P between the pair of contact portions 622 B of second interposition member 622 is the same as height position G of the center of second lens unit 32 (third lens unit 33 ).
  • magnet part 663 is disposed in a portion of first supported portion 611 of drive holder 61 that forms the bottom surface. Thus, magnet part 663 does not protrude in the space between first wall 111 and drive holder 61 . Consequently, the space between first wall 111 and drive holder 61 can be effectively utilized. Thus, the driving force of drive holder 61 can be increased by increasing the size of ultrasonic motor 63 , for example.
  • supporting part 67 since a portion of supporting part 67 is metal member 671 , the thickness of supporting part 67 can be reduced as compared with a configuration in which the supporting part is a resin member. Therefore, the length of housing 10 (lens driving device) in the Z direction can be reduced.
  • supporting part 67 is metal member 671 , the strength of the portion of supporting part 67 can be increased.
  • moving part 66 includes first supported portion 661 and second supported portion 662 , but the present invention is not limited thereto.
  • Moving part 66 may be composed only of the first supported portion.
  • the shaft part may include only the first shaft.
  • the configuration includes two lens driving parts 60 .
  • the present invention is not limited to this, and may have a configuration having one or more lens driving parts.
  • supporting part 67 is made of a metal member, but the present invention is not limited thereto, and may be made of a material other than a metal member.
  • first shaft 51 and second shaft 52 is the same position as the height position of the center of the movable lens.
  • the present invention is not limited thereto, and the height position of the center of the movable lens may be within the height range of the shaft part.
  • boosting part 65 (inductor) is disposed in housing 10 , but the present invention is not limited thereto, and the boosting part may be disposed outside the housing.
  • the intermediate position between the pair of contact portions 622 B of second interposition member 622 is the same as the height position of the center of the movable lens.
  • the present invention disclosure is not limited thereto and may be slightly deviated from the height position.
  • one position detecting part 70 is provided in each of drive holders 61 , but the present invention is not limited thereto.
  • a configuration may be employed which includes a plurality of position detecting parts 70 disposed side by side in the direction of the optical axis (Y direction). With such a configuration, it is possible to further improve the accuracy of the position detection for drive holder 61 .
  • side wall portion 11 and bottom wall portion 12 of housing 10 are formed by insert molding.
  • the present invention is not limited to this, and the bottom wall portion may be adhesively fixed to side wall portion 11 .
  • the above embodiment employs the configuration having two movable lenses composed of second lens unit 32 and third lens unit 33 , but the present invention is not limited to this, and the configuration may have a single movable lens, or three or more movable lenses.
  • the above embodiment employs the configuration having four lens units, but the present invention is not limited to this, and any number of lens units may be provided as long as the configuration has at least one movable lenses.
  • the number of lens driving parts is also one.
  • interposition part 62 is formed by bending a plate-like metal member, but the present invention is not limited to this, and the main body portion and the contact portion forming the interposition part may be formed by separate members.
  • drive holder 61 and interposition part 62 are formed of separate members, but the present invention is not limited thereto.
  • drive holder 61 and interposition part 62 may be integrally formed.
  • the above embodiment has the configuration in which the bottom wall portion includes the bent portions or half punches, but the present invention is not limited to this, and a configuration may also be used in which the bottom wall portion does not includes any bent portion or half punch.
  • resonant portion 631 includes two oscillators 631 B, but the present invention is not limited to this, and the present invention may have a configuration in which the resonant portion includes one oscillator, for example.
  • the drive control part, the reflection drive control part, and the image capturing control part are disposed separately, but the present invention is not limited to this, and at least two of the drive control part, the reflection drive control part, and the image capturing control part may be composed of one control part.
  • restricting portion 114 A is provided, but the present invention is not limited thereto, and no restricting portion may be provided.
  • the present invention is applicable to a camera-mounted device including a camera module and an image processing part that processes image information obtained by the camera module.
  • the camera-mounted device encompasses an information apparatus and a transporting apparatus.
  • the camera-mounted device encompasses an information apparatus and a transporting apparatus.
  • the information apparatus include a camera-mounted mobile phone, a note-type personal computer, a tablet terminal, a mobile game machine, a web camera, drone, and a camera-mounted in-vehicle device (for example, a rear-view monitor device or a drive recorder device).
  • examples of the transporting apparatus include an automobile, drone, and/or the like.
  • FIGS. 17 A and 17 B illustrate automobile V serving as the camera-mounted device in which in-vehicle camera module VC (Vehicle Camera) is mounted.
  • FIG. 17 A is a front view of automobile V
  • FIG. 17 B is a rear perspective view of automobile V.
  • camera module 1 described in the embodiment is mounted as in-vehicle camera module VC.
  • in-vehicle camera module VC may, for example, be attached to the windshield so as to face forward, or to the rear gate so as to face backward.
  • In-vehicle camera module VC is used for rear monitoring, drive recording, collision avoidance control, automatic drive control, and the like.
  • the lens driving device is useful for a lens driving device, a camera module, and a camera-mounted device capable of suppressing a response delay of a driving force to a movable part and an inclination of the movable part and accurately managing a position of the movable part.

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